Journal Article

PUBDB-2023-03140

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Energy Depletion and Re-Acceleration of Driver Electrons in a Plasma-Wakefield Accelerator

Pena Asmus, F. L. (Corresponding author)DESY* ; Lindstroem, C. A.DESY* ; Beinortaite, J.DESY* ; Björklund Svensson, J. H.DESY* ; Boulton, L. A.Extern* ; Diederichs, S.DESY* ; Foster, B.Extern*DESY* ; Garland, M. J.DESY* ; Gonzalez Caminal, P.Extern*DESY* ; Loisch, G.Extern*DESY* ; Schröder, S.DESY* ; Thévenet, M.DESY* ; Wesch, S.DESY* ; Wood, J. C.DESY* ; Osterhoff, J.DESY* ; D'Arcy, R.DESY*

2024
APS College Park, MD

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Please use a persistent id in citations: doi:10.1103/PhysRevResearch.6.043090  doi:10.3204/PUBDB-2023-03140

Abstract: For plasma-wakefield accelerators to fulfill their potential for cost effectiveness, it is essential that their energy-transfer efficiency be maximized. A key aspect of this efficiency is the near-complete transfer of energy, or depletion, from the driver electrons to the plasma wake. Achieving full depletion is limited by the process of re-acceleration, which occurs when the driver electrons decelerate to nonrelativistic energies, slipping backward into the accelerating phase of the wakefield and being subsequently re-accelerated. Such re-acceleration is unambiguously observed here for the first time. At this re-acceleration limit, we measure a beam driver depositing (57 ± 3)% of its energy into a 195-mm-long plasma. This suggests that the energy-transfer efficiency of plasma accelerators could approach that of conventional accelerators.

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Contributing Institute(s):

1. FTX Fachgruppe AST (HH_FH_FTX_AS)
2. Plasma Accelerators (MPA)

Research Program(s):

1. 621 - Accelerator Research and Development (POF4-621) (POF4-621)
2. 6G2 - FLASH (DESY) (POF4-6G2) (POF4-6G2)

Experiment(s):

1. FLASHForward

Appears in the scientific report 2024

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